Sheet-shearing machine.



D. LENNOX.

SHEET SHEARING MACHINE.

APPLIOATIQN FILED MAY 12, 1909. 954,68 1

Patented Apr. 12, 1910.

,0. ANDREW av GRAHAM co PHOIOVLITNOGRAPHLRS .wswmswu, :1

UNITED STATES PATENT OFFICE.

DAVID LENNOX, OF MARSHALLTOWN, IOWA, ASSIGNOR T0 LENNOX MACHINE 00., 0F MARSHALLTOWN, IOWA SHEET-SHEABING MACHINE.

Specification of Letters Patent.

Patented Apr. 12, 1910.

Application filed May 12, 1909, Serial No. 495,401.

To all whom it may concern:

Be it known that I, DAVID LENNOX, citizen of the United States, residing at Marshalltown, in the county of Marshall and State of Iowa, have invented certain new and useful Improvements in Sheet-Shearing Machines, of which the following is a specification.

My invention relates to shearing machines adapted to cut sheet metal or other material, and the chief objects of the improvements which form the subject matter of this application are :to provide a simple, efficient and practical sheet shearing machine of novel construction that will be capable of cutting sheet material of varying gage either in straight lines or curves of different degrees; to produce a machine of the class specified that will cut in or out curves with equal facility; to furnish a shearing mechanism that will be rapid in its operation, and that can be applied 'to a wide range of work.

Other objects of this invention are to provide a shearing apparatus that will bestrong and durable, having a mechanical construction requiring few parts that will not be liable to get out of order, and to furnish a machine of such design that it will be com act and may be manufactured and installs at a moderate outlay.

I accomplish the desired results by means of the apparatus illustrated in the accom panying drawing, which forms a part of this application, the important details of construction being disclosed in the following-views.

-Figure 1 is a side elevation of my improved shearing machine adapted to cut sheet material in curves, or straight lines;

Fig. 2- is an end elevation, and Fig. 3 is an enlarged fragmentary view showing the upper'cutter shaft, with its hearings in sec tion, Referrin to the details of the drawing, the numera 5 indicates a frame plate having marginal strengthening fianges 6, and base flanges 7', extending laterally to form a supporting foot plate. The said frame plate 5 is indented by a clearance slot 8 and the ortion of the frame plate below said slot 1s provided with a lateral extension or arm 9, terminating in an integral cylindrical en largement 10, arranged vertically, and bored longitudinally to form a shaft bearin or box-in which is mounted a lower cutter s aft hereinafter described. The upper portion of the frame plate 5 is deviated or inclined laterally from the vertical, and upon the portion lmmediately above the slot 8, formmg an upper. frame arm 11, is mounted a cylindrical boxing 12, similar in dimensions to the box 10 but inclined at the same angle as the frame part to which it is attached. This box, or bearing, however, is not made integral, as in the case of the said lower box 10, but is attached to the said arm 11 by lugs 13, which slide in grooves 14 formed on the opposite sides of the supporting arm by the marginal flanges 6; The said lugs 13 are secured by bolts 15, which pass through slots in the arm 11. The box 12 is adjusted by screws 16, supported in ribs 17, arranged transversely on the said arm. In the said boxes 10 and 12 are mounted, respectively, a vertical lower cutter shaft 18 and an upper inclined cutter shaft 19. The upper arm 12 is shorter than the lower, and this brings the shafts out of alinement, the upper shaft lying nearer the main frame of the machine than the other.

The ends of the shafts project beyond their bearings and their approximated ends carry cutters in the form of disks 20, 21, having suitably beveled margins, as indicated at 22, and attached to the lower and upper shafts, respectively. The center ofthe upper cutter 2l.coincides with the plane of the lower cutter 20, and the distance between the vertical plane coinciding with the axis of the upper inclined shaft 19, and the plane parallel thereto coinciding with the vertical shaft 18, is sufiicient to permit the margins of the cutters to be in contact. The cutting disks are attached to their respective shafts by means of fiat headed screws 23, which pass through central holes in the disks and engage threaded holes located axially in the shafts. The cutter disks are countersunk so that the heads of the screws will be flush with the surface and each screw head is furnished with holes 24 for the engagement of wrench points by means of which the screws are set. The ends of the shafts opposite the cutters carry beveled operatingcars 25, meshing with pinions 26, mounte on shafts 27, journaled in bearings 28, the ends of the shafts opposite the pinions carrying gears 29. These gears are driven by a smaller gear 30, loosely mounted on a stud shaft 31, supported in a boss 32 on the main frame and carrying a driving ala es, connected with the gear 30, and a loose pul- 34, .1, 7

It will be noted that the manner ofmounting and securing the cutter-shafts in their bearings differs in each case. The vertical shaft 18 has its lower end threaded to reeeive a suitable. nut 3 5. The lower end "of the inclined or upper shaft 19,,1SP1'0VidGd with an adjustable bearing, consisting of a threaded'bushing, .36, engaging a counterbore 37 in the :box 12 and haying'its ends-squared or angled to form a nut 38. The said shaft 19 is suspended in its bearings :by vmeans ofwa bolt screw 39 which, engages a threaded hole a0 in the shaft axis. This bolt, is prolonged ,beyondthe box '12 and upon its body is mounted a strong coiledspring 41, bearing at itsupper end againstthe headof the bolt, and at "the other engaginga cup: 42 on abearing plate 43, supported upon the end of the box. The bolt .39, and spring &1 are covered by a suitable capli, which slips over the margin of .said cup to form a protection for the bearings. e I

Since'the upper shaft 19 is inclined to the horizon, its cutter blade forms an angle with the coiiperating blade 20, designated by the reference numeral 4:5, ,FigqZ, and the advancing ginargin of the sheet to ,be sheared isintroducedinto the o ning between the' blades,"the plane of th tall As the said'sjheet A hown) is pushed onward the cutting as -f the meeting disks,'rotating in the direction ofthe arrows 46, will sever the material and at the same time tendtoforce the sheet onward in the proper direction, thus aiding the feedin process, and the efforts of: the; operator wi be chiefly applied to the proper guiding of v the sheet by deviating it, laterally in order to produce shearing'flines Qf deS1Id dl I'eC tion. ThQmanZner of handling the sheet to produce-the required results will be readily n too by n ski l d h a t lih h this apparatus 'belongsathus when the sheet is advanced in-a fright line theresult will be astraight cut, and if the rear end 'of the sheetisswung to the right vor left the horizontal plane,, the cut will be acurve or comb nation of curves, corresponding with 55. r j a fitha hex-' on h up er a ms d aries tions .inthe-thickness ogt th material pre-w the degree and uniformity of the deviations, I The cutters being subjected to; more or. lessweanjthe proper contact ofgthe disk dges s m n a d by e essary adjust n sheet being horizon-- t on with a suitable frame, of a vertical in the presence of two witnesses.

' "Witnesses:

sented to the'shearing elements are compensated for by the action of the coiled spring 11.

tion with the main frame, of a pair of vertically arranged rotatable shafts having their axe's'inclined to each other, circular cutting elements mounted on the ends of said shafts, and having their margins approximated, means for adjusting one of said shafts laterally, means for adjusting the same shaft longitudinally, and means for retating said shafts in opposite, directions.

2. Ina sheetshea ring.apparatus, the combination withthe main frame, of a'; pair of shafts having their axes inclinedto each other but not intersecting, circular cutting blades mounted on the send shafts and having their margins approximated, means for adjusting .one' of said shafts laterally, means for automatically adjusting the same shaft longitudinally-j? and means for operating said 3. In ,ajshearing apparatus, the combination with a suitable frame, of a, vertical shaft, a yielding inclined shaft, an adjust-- able bearing for said inclined shaft, cutting:

I bladesfixed on said shafts, said bladeszhav Tin-g approximated edges, and means foreperatin said shafts.

4. n a shearing apparatus, the combinashaft, an inclined shaft, resilient means suspending said inclined shaft in its bearings cooperating cutting blades on said shafts and means for operating the shafts.

' for yieldingly suspending said inclinedsshaft inits bearings, and-cooperative cutting elements on said shaft.

6. In a shearing apparatus, the combination with a frame, a pair of shafts onsaid frame having axes inclined to each other but, not intersecting, means for adjusting one of said shafts both laterally, and 10a tudinally, circular cooperating cutters out; e shafts, and operative means for said shafts.

In testimony whereof I a-fiix my signature DAVID WHINERY, :1 A, MORGAN, 

